Was just flicking through all the XP teams website and came upon this on the starchaser website, where they talk about a vertically launced 8 seater space plane for sub-orbital flights, but could also be configured for orbital flights. This is as well as using the 3 seater ThunderStar Capsule.

The space plane will be launched a top an enhanced Starchaser 5 booster.
This was all in an article on becoming an astronaut for them!